I have an iPod Classic 120GB that functions perfectly in every sense, except that when I try to play songs or movies, the progress bar stays on 0:00 and it won't actually play. My warranty has expired and I have tried resetting, toggling etc. Ideally I would really like to fix the problem myself, but the only suggestions I seem to find online are the 5 R's and thumping the iPod which haven't worked. Does anyone have a solution to this issue please??